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Vulnerability · Published Aug 31, 2026 · Assigned by VulDB

CVE-2026-82820FLVMeta AMF String Processing amf.c amf_string_new heap-based overflow

Medium 4.3

In plain English

A medium-severity heap buffer overflow in FLVMeta. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.6%top 49.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

A vulnerability was found in FLVMeta up to 1.2.2. Affected is the function amf_string_new of the file src/amf.c of the component AMF String Processing. The manipulation of the argument length results in heap-based buffer overflow. The attack can be launched remotely. The exploit has been made public and could be used. The patch is identified as f412a33b9a84c2d1a9dee145a868feddbf64879e. A patch should be applied to remediate this issue. The project maintainer doubts the security impact: "While I acknowledged the bugs and provided fixes, I have yet to see any way to exploit these alleged vulnerabilities."

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12flvmetano fix listedDEBIAN-CVE-2026-82820
Debian:13flvmetano fix listedDEBIAN-CVE-2026-82820
Debian:14flvmetano fix listedDEBIAN-CVE-2026-82820
Ubuntu:22.04:LTSflvmetano fix listedUBUNTU-CVE-2026-82820
Ubuntu:24.04:LTSflvmetano fix listedUBUNTU-CVE-2026-82820
Ubuntu:26.04:LTSflvmetano fix listedUBUNTU-CVE-2026-82820
Ubuntu:26.10flvmetano fix listedUBUNTU-CVE-2026-82820

Affected products (as reported)

VendorProductVersions
n/a FLVMeta 1.2.01.2.11.2.2

Weakness: CWE-122, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C

References